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1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   Automatic Send Receive
   ASR
      <hardware> (ASR) Part of a designation for a hard-copy
      terminal, manufactured by Teletype Corporation, which
      could be commanded remotely to send the contents of its paper
    tape reader.  The ASR-33 was the most common minicomputer
      terminal in the early 1970s.
      (1995-11-23)